Which of the following statements about the effect of surface area and vobi,,2beyf,dv lume on the cel,2,fbedy ibv, l’s processes is false?

  Which statement best describes stem cells?j k*9 zinqwfkl+on2.)

  Which is a correct description of the cell type adapted foo)c8dxvk7*n r r gas exchange in the lungsx8dc*7 vnk )ro?

  Which of the following explains the limitation+4 i)pgur:; m illq9ffs on cell size?

  What is this cell's most likely primarbns19 mcl p7r*l6jd1 oy function, and where could it be located in a mammald 7 j1 lmnc9b*osp16rl?

  Which of the following charub5u gc zwhe) s;rx018acteristics of type I pneumocytes contribute to increasing the rate of gas exchangsh1r)0euw 8ucb ;gz5x e?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow transplant from a 36 year old. One on0/ mo .qrl de9nkf(*of the functions of these cells is to produce red and white blood cells. What type of sno fon/lr(k d0.e*9q mtem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and stk lowf 1x+ip25riated muscle fibres? o xl+k1i5f2p w

Below is a diagram of a motor neuron. Neur9jopsck*dl8 0ons are the longest cells in the human blk9o*dp j8cs0ody.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer fromlp)ldywa+8e0x :5oehi n c8 tw,8tk h/ infant respiratory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli st8hptnt+hid0 o8,/aexl 58ek c:)ww y lructures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a ruexc+wpgup9l7e 9/ o*eason that embryonic stem cells are not used in the treatment of lgp xop9u7ue l*w9+ce/eukaemia?

  The table shows the diameters of red blood cellsyp ;jx:i;t4* 3ug xjts from different organisms. Which red bloodpsgu tjy;:4x*t; jix3 cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal g7n,dl q3v1ureq6a( odiwr/-convoluted tubule make these cewugr176ovqndd a 3/-ir,( qlells more adapted to the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem ceqe3( zql2oe ue/na6)if ak01ills and specialised cells is/are not true q0i zoeqleaa1/n)e263fu(ik?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is the correct order from smallest tf 5:dtkfnmr -ha/t j0(o largest?dmt /-k0f tj:anr fh5(

  Which row in the following table give fhdd7fw 7p)5kqpc9 1n)elav)s the correct disadvantages of the different stem cell sources for therapeutic uvk )))aechpdw9ln p5d7f1fq7ses?

1.Describe how the use of stem cells may be used to tr w6hf(5 usul4-dm i;iteat type I diabetes in the future. t iu4h5;i 6ulwsf(dm-

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of spec0y33w+ q.kguxlqv (yr ialised cells (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.